Dissolve Mode

Dissolve Mode

By Nikolai Sklobovsky
This mode follows the Normal mode in the list of layer blending modes. However, while being close to Normal mode in the list, its pretty far from it functionality-wise.
The biggest difference, at least how I understand it, is that, unlike Normal mode, which is used ubiquitously to blend photographs, Dissolve mode is mostly used to blend non-photo objects (i.e. shapes, text, etc.), as well as to create special effects that require some randomness.
Lets see how it works.

Let us follow the same simple path we did with the normal mode. Create a new medium sized document with a white background, stroke its border with 4 pixel back edge, add a new layer, select a Elliptical Marquee tool (M), make circular selection (press Shift for that) and fill the selection with pure Black. There are different ways to do that, one of the simplest being to use Paint Bucket tool (G).
By default, all the new layers are created in Normal mode. Lets change the mode to Dissolve.
Hold your breath and nothing happens :-(!

Bummer! What did we do wrong? You can be so frustrated that you may wanna press F1 for help. Do that, and youll be rewarded with the following paragraph:

DissolveEdits or paints each pixel to make it the result color. However, the result color is a random replacement of the pixels with the base color or the blend color, depending on the opacity at any pixel location.
A-ha! Opacity! We need to change the opacity to see the effect. Lets set its value to 50% - and notice the change!

You can play with different values to see that this mode in fact provides us with a very good random pixel generator. Heres how it looks at 5% opacity.
OK, this is all nice, but how can we use this interesting random-generating Dissolve mode in a real life?
As I mentioned before, using this mode for blending two photographs rarely produces valuable results. However, with shapes and texts its a different story.

Dissolving Text

Lets start with some random picture that can play a role of a smooth background. I have chosen this nothing-out-of-the ordinary sunset shot of mine with some funny wavy clouds.
I also put two layers of text above it.
As you can see, even though I set the blending mode for text layers to Dissolve, at 100% opacity we only got a bit of fuzziness, nothing more. Lets change it.

I intentionally created two different layers with text to see how Fill and Opacity sliders would work in this case.
As with Normal mode, with the absence of the Styles both Fill and Opacity produce identical effect. The white text now clearly reminds chalk writing, while the black one Well, you can find your own analogy :-)
Lets add shadow to both lines and play with the sliders a little.

I added Drop Shadow style to both layers (Angle 45, Distance 15, Spread 10, Size 15). Well, in fact I added it only to one layer and then Alt/Option + dragged the effect icon to another layer to copy it.
Then I set 100% Opacity and 30% Fill on Thousand Oaks and 50% Opacity and 100% Fill on Sunset Hills.
You can see the difference in the results.
As before, Fill didnt touch the shadow at all, while Opacity gladly did, dissolving the shadow along with the text.

Brushed Metal

As it was mentioned before, Dissolve mode can serve as a source of some random data. Lets see how we can use it to create a classic brushed metal effect.
Lets start with an edged white rectangle, create a new empty layer, but instead of creating black circle with a rectangular marquee, lets simply pick a large soft black brush and click it once.
The set the mode to Dissolve and the Opacity to 50%. Well get something like this.

Now we need to do something tricky: we need to solidify the effect.
To achieve this, well perform the following steps:
1. Highlight Background, press Ctrl/Cmd+J (it creates a copy of the layer)
2. Highlight Layer 1, copy the circle layer by pressing the Ctrl/Cmd + J.
3. Highlight Layer 1 again.
4. Press Ctrl/Cmd + E to merge two copies together. Note that the merged layer is in a Normal mode.
5. Hide the copy of layer 1 by clicking its eye icon once. We wont need it anymore, but its a good practice to keep the layers we used handy.

Now more fun part: Filter, Blur, Motion Blur.
Set Angle to 45 and Distance to 600.
Youll get something like following.
As it is easy to see, we already getting something that reminds a brushed metal, we only need to apply it to some shape. And what shape can be better than text?

That Sin City Look

Its always dark in Sin City, and its always raining. How can we get this effect? Dissolve Mode to the rescue!
Lets again start with any random picture and using whatever PS tools necessary give it a Sin City-adequate look.
For the record, I must assure you that the person shown in this picture is, in fact, a vegetarian, and the food on the plate is made of flour and not even red in color  its yellow, however :-))
Having the base ready, we want to add night and, most of all, rain.

As with the "Brushed Metal", we need to solidify the Dissolve effect. So we create a copy of each layer, merge them and hide the originals, leaving only the merged copy in a Normal mode.
The main picture remains intact.

To make rain, lets perform Filter|Blur|Motion Blur menu command, with the Angle of 60 and Distance of 33.
We can see its there, but its barely visible.
No fear!
Our last step is to change its mode from Normal to Vivid Light, add some crooked text  and you better take the kids away: your Sin City Sushi ad is ready!

Conclusion

Dissolve mode, while rarely usable all by itself, can serve as a great sidekick in generating randomness. It also works great with shapes and text.